USS H-2 (SS-29) was a H-class submarine. She was originally named Nautilus, the third ship and first submarine of the United States Navy to bear the name, which was derived from a Greek word meaning "sailor" or "ship." The nautilus is also a tropical mollusk having a many-chambered, spiral shell with a pearly interior. Nautilus was laid down by the Union Iron Works of San Francisco, California. She was renamed H-2 on 17 November 1911, launched on 4 June 1913 sponsored by Mrs. William Ranney Sands, and commissioned on 1 December 1913, Lieutenant, junior grade Howard H.J. Benson in command.